The load on the battery will drop the available voltage while the starter is running. Does the starter have the switch with the small side terminal that bypasses the ignition resistor? The resistor is supposed to drop the running voltage to about 9-9.5 volts to protect the points from being burned. If not, you need to purchase one from somewhere like Rock Auto. They call the switch a "solenoid", BTW. Wrong name!

www.rockauto.com/en/moreinfo.php?pk=445442&cc=1489472&pt=4188&jsn=930

Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!